December in Salzburg is the windiest month of the year. In December, the weather in Salzburg is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Salzburg has 13 rainy, 7 sunny, 5 cloudy, 5 partly cloudy, and 1 snowy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Salzburg.